Compression socks should feel significantly tighter than regular socks, providing a "firm hug" sensation, but they should never be painful or cut off your circulation. You know they are tight enough if they feel most snug at the ankle and gradually feel less tight as they move up toward the knee (this is called "graduated compression"). A good test is to try and slide one or two fingers under the top band; if you can't fit any fingers, they are too tight, and if you can easily fit your whole hand, they are too loose. They should stay in place without sliding down or bunching up, and they should not leave deep, painful indentations or red welts on your skin. If your toes feel numb or tingly, or if the skin above the sock becomes discolored, you must remove them immediately. For the best results in 2026, many specialists recommend taking an accurate measurement of your calf circumference before purchasing to ensure a medical-grade fit.